code: def brute_force_sym(f, dy, dx):
      cmat = brute_force(f, dy, dx)
      return cmat + cmat.T
  
imports: import numpy
  from mahotas.features import texture
  import mahotas
  import mahotas.features._texture
  import pytest
label_desc: Use image node_id 5 for calling a global function with example usage: brute_force_sym(f, dy, dx) and returns: unknown